Intermittent grip for saw-mill set-works



I (No Model.) 2 Sheets-Sheet 1.

W. S. BE-EMAN.

INTEEMITTENT GRIP FDR SAW MILL SET-WORKS; @w. No. 425,398. Patented Apr. 15, 1890.

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W s. BBEMAN. INTBRMITTENT GRIP FOR SAW MILL SET WORKS, 650.

Nb. 425,393. Patented Apr. 15, 1890.

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UNITED STATES WILLIAM S. BEEMAN, OF ASHLAND, WISCONSIN.

INT ERMITTENT GRIP FOR SAW-MILL SET-WORKS, 80C.

SPECIFICATION forming part of Letters Patent No. 425,398, dated April 15, 1890.

Application filed April 22, 1839. Serial No. 303,174. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM S. BEEMAN, of

I Ashland, in the county of Ashland and State of IVisconsin, have invented certain new and useful Improvements in Intermittent Grips for Saw-dill Set-"Works, due; and I do hereby declare that the following is a full, clear, and exact description. of the invention, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The main object of my invention is to provide a simple and effective substitute for a pawl and ratchet-wheel in a saw-mill setworks and for the various uses to which a pawl and ratchet-wheel are applicable.

It consists, essentially, of an intermittent grip composed of an internal friction-wheel, an oscillatory head, friction-shoes, and mechanisminterposed between said shoes and head, whereby the said shoes are forced outwardly into engagement with said friction-wheel when the head is turned forward, but are released from such engagement when the head is turned backward, and of certain other peculiarities of construction and arrangement, hereinafter specifically described, by which said grip is adapted to a saw-mill set-works or the like.

In the accompanying drawings like letters designate the same parts in the several figthe movable bearing for the friction-driver employed with the frictionwheel of the grip for receding, and Fig. 6 is a plan view of a portion of a saw-mill carriage embodying my improvements.

Although my improved intermittent grip Fig. 3 is an axial section on is applicable to various uses, for convenience of illustration I have shown it adapted and applied to the set-works of asaw'mill carriage.

Referring to Figs. 1 and 6, A represents a portion of the frame of a saw-mill carriage; B B, its supporting-axles; C O, the carriagewheels; D D, the track-rails upon which they travel; E, one of the head-blocks; E, a knee or standard movable longitudinally thereon and provided with a rack e; F, the set-shaft provided with pinions, which engage with racks e of the several knees or standards E, all of the usual or any suitable form and construction.

Upon the set-shaft F is keyed or otherwise suitably fixed a friction-wheel G, which is formed with an overhanging rim 9 g. Upon the hub of the friction-wheel G are loosely mounted the oscillatory heads H H, which are retained in place thereon by disks g, bolted to and overlapping the outer ends of said hub, as shown in Figs. 2 and I I are friction-shoes adapted on their outer faces to the inner faces of the projecting rim 9 g of the friction-wheel G and formed on their inner faces with transverse seats for the arms i 2', which are interposed between them and the heads II II, in which they have corresponding seats at their opposite ends. The arms 71 '6 are set at an inclination to radii of the friction-wheel G, and between them and projections h h on the heads II are interposed springs 72,, as shown in Fig. 2, which tend to carry their outer ends into the lines of the radii, passing through their inner ends, and thereby to bring the outer faces of the shoes I I into engagement with the rim g g of the friction-wheel G.

To the heads II II are bolted or otherwise suitably attached the circular plates or covers J J ,which close theannular recesses in the sides of the friction-wheel G. In an annular groove formed in the inner face of each of the plates J J is inserted a ri 1.1g j, provided with inwardlyprojecting studs 7", adjacent to the sides of the arms 2' 'i, opposite the springs 7i, as shown in Figs. 2, 3, and 4, and in each of said plates J is journaled a pinion j, which meshes with a rack formed in a portion of the periphery of said ring j. To the outwardly-projecting j onrnal of each pinion j is fixed a crank-arm j carrying at the end a'friction-roller j.

7c is a rock shaft supported in suitable bearings on the rear side of the carriage parallel with the set-shaft F and provided with the setting-lever K and with a cross-head 70, which is connected by links 70 k with earsj j on the circular plates J J of the intermittent grip.

K is a quadrant of the usual form, provided with a fixed and an adjustable stop for limiting the throw of the setting-lever K.

For the purpose of receding or running the knees back by the movement of the car- .turn in the direction opposite that in which it is turned by the friction-shoes I, said shoes must be held out of engagement therewith- To accomplish this end, I provide a forked step-lever N, fulcrumed to the carriage side adjacent to the friction-clutch and having curved arms at n, adapted when raised to engage with the friction-rollers 7' on the outer ends of the crank-arms 7' and thereby turn the rings j so as to carry the studs j on their inner faces against the arms 1' and compress the springs 71/, thus preventing them from forcing the friction-shoes I outwardly into engagement with the rim g of the friction-E wheel G.

I T o prevent the overrunning of the frictionwheel G in receding, I provide a brake-strap 0, attached at one end to the carriage and at the other end to a bell-crank lever O, by means of which it is drawn by the operator against the periphery of said friction-wheel G.-

My. improved device operates as follows: To advance the knees E, the setting-lever K isswung by the operator to the right or left, or both, and through the cross-head k and links one of the circular plates J, with the head H attached thereto, is turned forward, and the other circular plate and head H is correspondingly turned backward. When either head H is turned forward, as indicated by thearrow,Fig. 2, the friction-shoes I, th'rown outwardly by the action of the springs h on the inclined arms 1' into engagementwith the rim g of the friction-wheel G, cause said friction-wheel to turn therewith; but when the head H is turned backward the inclined arms '11 2' are carried slightly toward the projections it a ainst the s rin s h, and the shoes I are allowed to slide freely along the rim g of the friction-wheel without turning it. --The distance the knees are advanced by a single throw of the setting-lever is regulated by the adjustable stop in the quadrant K, the lever K being moved in setting from one stop to the other and back to the starting-point. I11

lever in either direction turns the frictionwheel G and set-shaft forward. To run the knees back, the operator depresses the steplever N, thereby holding the friction-shoes I out of engagement with the rim g of the friction-wheel G, as previously described; and

when the carriage is being gigged or run back, as indicated by the arrow in Fig. 6, the lever L is swung toward the center of the carriage and the continuously-rotatedfrictiondriver L moved into engagement with the periphery of said friction-wheel G,'which is thereby turned in the required direction to recede the knees. To arrest the backward movement of the'knees, the lever L is released and the brake-lever 0 moved toward the center of the carriage, carrying the strap 0 into engagement with the friction-wheel G.

My improved device is susceptibleof various modifications within the spirit of my invention to adapt it to, the various uses to which it is applicable. For some purposes a single oscillatory head may be employed and the number of friction-shoes may be more or less, according to circumstances. It is obvious that the connections of my improved clutch will be varied according tothe uses to which it is applied. T

I claim 1. An intermittent grip consisting of aninternal friction-wheel, a friction-shoe adapted to engage the rim of said frietionwheel and having on its inner face a seat, an oscillatory head concentric with said' frictionwheel and having a seat in its outer face, and an inclined arm interposed between said head and said shoe and bearingat the ends in the seats therein, substantially as and for the purposes set forth. 1 2. An intermittent grip consisting of a friction-wheel, friction-shoes adapted to engage the rim of said friction-wheel and-having seats in their inner faces, an oscillatory head having seats in its outer face, and inclined arms interposed between said head and said shoes and bearing at the ends in the seats therein, substantially as and for the purposes set forth.

3. An intermittent grip consisting of an internal friction-wheel, friction-shoes adapted to engage the rim' of said friction-wheel and having transverse seats in their inner faces, an oscillatory head having similar seats in its outer face, inclined arms interposed between said head and shoes and hearing at the ends in the seats therein, and springs interposed between said arms and projections on said head and tending to force said shoes,

outwardly into engagement with the rim of said friction-wheel, substantially as and for the purposes set forth.

4. An intermittent grip consisting of an internal friction-wheel, friction-shoes adapted to engage the inner face of the rim of said wheel, an oscillatory head, inclined arms interposed between said head and shoes, springs interposed between said arms and projections on said head, a plate attached to said head and carrying on its inner face a ring provided with inwardly-projecting studs, and

.meaus for turning said ring, whereby said studs are carried into engagement with said arms on the sides opposite said springs, substantially as and for the purposes set forth.

5. An intermittent grip consisting of a friction-wheel having a laterally-projecting rim on both sides, two oscillatory heads, one on each side of said friction-wheel, frictionshoes adapted to engage the overhanging rim of said friction-wheel, inclined arms interterposed between said shoes and said heads, and connections whereby said heads are oscillated alternately in opposite directions, substantially as and for the purposes set forth.

6. An intermittent grip consisting of a friction-wheel having a projecting rim on both sides, friction -shocs adapted to engage the inner faces of said rim, oscillatory heads on each side of said friction-wheel and movable independently thereof, inclined arms interposed between said heads and. said shoes, cover-plates attached to said heads and inclosing the internal mechanism of said grip, and means for oscillating said cover-plates alternately in opposite directions, substantially as and for the purposes set forth.

7. An intermittent grip consisting of a friction-wheel having a laterally-projecting rim on both sides, friction-shoes adapted to engage the inner faces of said rim, oscillatory heads on opposite sides of said friction-wheel, inclined arms interposed between said heads and shoes, springs interposed between said arms and projections on said heads, coverplates attached to said heads, and rings inserted in annular grooves in the inner faces of said coverplates and provided with inwardly-projecting studs, and pinions journaled in said cover and engaging racks formed in said rings, whereby said shoes are held out of engagement with the rim of said frictionwheel, substantially as and for the purposes set forth.

8. The combination, with an intermittent grip for saw-mill set-works, consisting of an internal friction-wheel mounted on the setshaft, friction-shoes adapted to engage the overhanging rim of said friction-wheel, an oscillaforyhead and in clined armsinterposed between said head and shoes, and springs placed between said arms and projections on said head and tending to move said arms into radial lines, of a setting-lever connected with and arranged to oscillate said head, and means for holding said shoes out of engagement with said friction-wheel, so as to allow the lat ter to be turned backward, substantially as and for the purposes set forth.

9. The combination, with an intermittent grip for saw-mill set-works, consisting of a friction-wheel fixed upon the set-shaft and having a laterally -projecting rim on both sides, oscillatory heads, one on each side of said friction-wheel, friction-shoes adapted to engage the inner faces of said rim, and inclined arms interposed between said head andshoes, of a rock-shaft provided with a setting-lever and a cross-head which is connected with and arranged to oscillate the heads of said intermittent grip alternately in opposite directions, substantially as and for the purposes set forth.

10. The combination, with an intermittent grip for saw-mill set-works, consistingof a friction-wheel fixed upon the set-shaft, friction-shoes adapted to engage the rim of said friction-wheel, an oscillatory head, and inclined arms interposed between said head and shoes, of a settinglever connected with and arranged to oscillate said head, and a friction-driver geared with one of the carriageaxles and arranged to bebronght into engagement with the friction-wheel of said grip for the purpose of receding, substantially as and for the purposes set forth.

11. The combination, with an intermittent grip for saw-mill setworks, consisting of a friction-wheel fixed upon the set-shaft, an oscillatory head connected with and arranged to be operated by the setting-lever, frictionshoes adapted to engage the rim of said frict-ion-wheel, inclined arms interposed between said head and shoes, and springs interposed between said arms and projections on said head, of a ring connected with said oscillatory head and having inwardly-projecting lugs adjacent to said inclined arms, a pinion meshing with a rack in said ring and provided with a crank-arm, and a lever fulcrumed on the carriage and arranged to engage said crank-arm, turn said ring and thereby hold said shoes out of engagement with said friction-wheel, substantially as and for the puradapted to engage the inner face of the rinr of the friction-wheel, and inclined arms interposed between said oscillatory head and said friction-shoes, of a frictiomdriver geared with one of the carriage-axles and arranged to be moved by the operator into engagement with the periphery of the friction-wheel of said intermittent grip, and a brake strap and lever connected therewith arranged to arrest the movement of said friction-wheel, substantially as and for the purposes set forth.

13. An intermittent grip consisting of a friction-wheel having a laterally-projecting rim, friction-shoes adapted to engage the inner face of said rim, an oscillatory head, mechanism interposed between said head and shoes, whereby the latter are forced outwardly by theforward movement of said head and allowed to recede by the backward movement of said head, and mechanism for holding the shoes out of engagement with said frictionwheel, so as to permit the turning of the latter backward, substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my own I aifix my signature in presence of two witnesses.

WILLIAM S. BEEMAN\ Witnesses:

N. I. WVILLEY, L. F. DURFEE. 

